test_retry: Add test-agnostic scenario based on just reason

There are a lot of vm retry scenarios that are repeated for
many many tests.

BUG=chromium:1082764
TEST=./gen

Change-Id: I1772d82ad862d64e83594bd3d1df8202d5a9a34d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2231181
Tested-by: Dhanya Ganesh <dhanyaganesh@chromium.org>
Auto-Submit: Dhanya Ganesh <dhanyaganesh@chromium.org>
Reviewed-by: David Burger <dburger@chromium.org>
Reviewed-by: Sean Abraham <seanabraham@chromium.org>
Commit-Queue: Dhanya Ganesh <dhanyaganesh@chromium.org>
2 files changed